Benzenesulfonicacid, 4,4'-(1,10-phenanthroline-4,7-diyl)bis-, disodium salt (9CI);1,10-Phenanthroline-4,7-diphenyl-p-disulfonic acid disodium salt;4,7-Bis(4-sulfophenyl)-1,10-phenanthroline disodium salt
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